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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cd2d5b52 | 2 | /**************************************************************************** |
f7a6d2c4 BH |
3 | * Driver for Solarflare network controllers and boards |
4 | * Copyright 2010-2012 Solarflare Communications Inc. | |
cd2d5b52 BH |
5 | */ |
6 | #include <linux/pci.h> | |
7 | #include <linux/module.h> | |
8 | #include "net_driver.h" | |
9 | #include "efx.h" | |
10 | #include "nic.h" | |
11 | #include "io.h" | |
12 | #include "mcdi.h" | |
13 | #include "filter.h" | |
14 | #include "mcdi_pcol.h" | |
8b8a95a1 | 15 | #include "farch_regs.h" |
7fa8d547 | 16 | #include "siena_sriov.h" |
cd2d5b52 BH |
17 | #include "vfdi.h" |
18 | ||
19 | /* Number of longs required to track all the VIs in a VF */ | |
20 | #define VI_MASK_LENGTH BITS_TO_LONGS(1 << EFX_VI_SCALE_MAX) | |
21 | ||
45078374 BH |
22 | /* Maximum number of RX queues supported */ |
23 | #define VF_MAX_RX_QUEUES 63 | |
24 | ||
cd2d5b52 BH |
25 | /** |
26 | * enum efx_vf_tx_filter_mode - TX MAC filtering behaviour | |
27 | * @VF_TX_FILTER_OFF: Disabled | |
28 | * @VF_TX_FILTER_AUTO: Enabled if MAC address assigned to VF and only | |
29 | * 2 TX queues allowed per VF. | |
30 | * @VF_TX_FILTER_ON: Enabled | |
31 | */ | |
32 | enum efx_vf_tx_filter_mode { | |
33 | VF_TX_FILTER_OFF, | |
34 | VF_TX_FILTER_AUTO, | |
35 | VF_TX_FILTER_ON, | |
36 | }; | |
37 | ||
38 | /** | |
bf3d0156 | 39 | * struct siena_vf - Back-end resource and protocol state for a PCI VF |
cd2d5b52 BH |
40 | * @efx: The Efx NIC owning this VF |
41 | * @pci_rid: The PCI requester ID for this VF | |
42 | * @pci_name: The PCI name (formatted address) of this VF | |
43 | * @index: Index of VF within its port and PF. | |
44 | * @req: VFDI incoming request work item. Incoming USR_EV events are received | |
45 | * by the NAPI handler, but must be handled by executing MCDI requests | |
46 | * inside a work item. | |
47 | * @req_addr: VFDI incoming request DMA address (in VF's PCI address space). | |
48 | * @req_type: Expected next incoming (from VF) %VFDI_EV_TYPE member. | |
49 | * @req_seqno: Expected next incoming (from VF) %VFDI_EV_SEQ member. | |
50 | * @msg_seqno: Next %VFDI_EV_SEQ member to reply to VF. Protected by | |
51 | * @status_lock | |
52 | * @busy: VFDI request queued to be processed or being processed. Receiving | |
53 | * a VFDI request when @busy is set is an error condition. | |
54 | * @buf: Incoming VFDI requests are DMA from the VF into this buffer. | |
55 | * @buftbl_base: Buffer table entries for this VF start at this index. | |
56 | * @rx_filtering: Receive filtering has been requested by the VF driver. | |
57 | * @rx_filter_flags: The flags sent in the %VFDI_OP_INSERT_FILTER request. | |
58 | * @rx_filter_qid: VF relative qid for RX filter requested by VF. | |
59 | * @rx_filter_id: Receive MAC filter ID. Only one filter per VF is supported. | |
60 | * @tx_filter_mode: Transmit MAC filtering mode. | |
61 | * @tx_filter_id: Transmit MAC filter ID. | |
62 | * @addr: The MAC address and outer vlan tag of the VF. | |
63 | * @status_addr: VF DMA address of page for &struct vfdi_status updates. | |
64 | * @status_lock: Mutex protecting @msg_seqno, @status_addr, @addr, | |
65 | * @peer_page_addrs and @peer_page_count from simultaneous | |
66 | * updates by the VM and consumption by | |
327c685e | 67 | * efx_siena_sriov_update_vf_addr() |
cd2d5b52 BH |
68 | * @peer_page_addrs: Pointer to an array of guest pages for local addresses. |
69 | * @peer_page_count: Number of entries in @peer_page_count. | |
70 | * @evq0_addrs: Array of guest pages backing evq0. | |
71 | * @evq0_count: Number of entries in @evq0_addrs. | |
72 | * @flush_waitq: wait queue used by %VFDI_OP_FINI_ALL_QUEUES handler | |
73 | * to wait for flush completions. | |
74 | * @txq_lock: Mutex for TX queue allocation. | |
75 | * @txq_mask: Mask of initialized transmit queues. | |
76 | * @txq_count: Number of initialized transmit queues. | |
77 | * @rxq_mask: Mask of initialized receive queues. | |
78 | * @rxq_count: Number of initialized receive queues. | |
79 | * @rxq_retry_mask: Mask or receive queues that need to be flushed again | |
80 | * due to flush failure. | |
81 | * @rxq_retry_count: Number of receive queues in @rxq_retry_mask. | |
82 | * @reset_work: Work item to schedule a VF reset. | |
83 | */ | |
bf3d0156 | 84 | struct siena_vf { |
cd2d5b52 BH |
85 | struct efx_nic *efx; |
86 | unsigned int pci_rid; | |
87 | char pci_name[13]; /* dddd:bb:dd.f */ | |
88 | unsigned int index; | |
89 | struct work_struct req; | |
90 | u64 req_addr; | |
91 | int req_type; | |
92 | unsigned req_seqno; | |
93 | unsigned msg_seqno; | |
94 | bool busy; | |
95 | struct efx_buffer buf; | |
96 | unsigned buftbl_base; | |
97 | bool rx_filtering; | |
98 | enum efx_filter_flags rx_filter_flags; | |
99 | unsigned rx_filter_qid; | |
100 | int rx_filter_id; | |
101 | enum efx_vf_tx_filter_mode tx_filter_mode; | |
102 | int tx_filter_id; | |
103 | struct vfdi_endpoint addr; | |
104 | u64 status_addr; | |
105 | struct mutex status_lock; | |
106 | u64 *peer_page_addrs; | |
107 | unsigned peer_page_count; | |
108 | u64 evq0_addrs[EFX_MAX_VF_EVQ_SIZE * sizeof(efx_qword_t) / | |
109 | EFX_BUF_SIZE]; | |
110 | unsigned evq0_count; | |
111 | wait_queue_head_t flush_waitq; | |
112 | struct mutex txq_lock; | |
113 | unsigned long txq_mask[VI_MASK_LENGTH]; | |
114 | unsigned txq_count; | |
115 | unsigned long rxq_mask[VI_MASK_LENGTH]; | |
116 | unsigned rxq_count; | |
117 | unsigned long rxq_retry_mask[VI_MASK_LENGTH]; | |
118 | atomic_t rxq_retry_count; | |
119 | struct work_struct reset_work; | |
120 | }; | |
121 | ||
122 | struct efx_memcpy_req { | |
123 | unsigned int from_rid; | |
124 | void *from_buf; | |
125 | u64 from_addr; | |
126 | unsigned int to_rid; | |
127 | u64 to_addr; | |
128 | unsigned length; | |
129 | }; | |
130 | ||
131 | /** | |
132 | * struct efx_local_addr - A MAC address on the vswitch without a VF. | |
133 | * | |
134 | * Siena does not have a switch, so VFs can't transmit data to each | |
135 | * other. Instead the VFs must be made aware of the local addresses | |
136 | * on the vswitch, so that they can arrange for an alternative | |
137 | * software datapath to be used. | |
138 | * | |
139 | * @link: List head for insertion into efx->local_addr_list. | |
140 | * @addr: Ethernet address | |
141 | */ | |
142 | struct efx_local_addr { | |
143 | struct list_head link; | |
144 | u8 addr[ETH_ALEN]; | |
145 | }; | |
146 | ||
147 | /** | |
148 | * struct efx_endpoint_page - Page of vfdi_endpoint structures | |
149 | * | |
150 | * @link: List head for insertion into efx->local_page_list. | |
151 | * @ptr: Pointer to page. | |
152 | * @addr: DMA address of page. | |
153 | */ | |
154 | struct efx_endpoint_page { | |
155 | struct list_head link; | |
156 | void *ptr; | |
157 | dma_addr_t addr; | |
158 | }; | |
159 | ||
160 | /* Buffer table entries are reserved txq0,rxq0,evq0,txq1,rxq1,evq1 */ | |
161 | #define EFX_BUFTBL_TXQ_BASE(_vf, _qid) \ | |
162 | ((_vf)->buftbl_base + EFX_VF_BUFTBL_PER_VI * (_qid)) | |
163 | #define EFX_BUFTBL_RXQ_BASE(_vf, _qid) \ | |
164 | (EFX_BUFTBL_TXQ_BASE(_vf, _qid) + \ | |
165 | (EFX_MAX_DMAQ_SIZE * sizeof(efx_qword_t) / EFX_BUF_SIZE)) | |
166 | #define EFX_BUFTBL_EVQ_BASE(_vf, _qid) \ | |
167 | (EFX_BUFTBL_TXQ_BASE(_vf, _qid) + \ | |
168 | (2 * EFX_MAX_DMAQ_SIZE * sizeof(efx_qword_t) / EFX_BUF_SIZE)) | |
169 | ||
170 | #define EFX_FIELD_MASK(_field) \ | |
171 | ((1 << _field ## _WIDTH) - 1) | |
172 | ||
173 | /* VFs can only use this many transmit channels */ | |
174 | static unsigned int vf_max_tx_channels = 2; | |
175 | module_param(vf_max_tx_channels, uint, 0444); | |
176 | MODULE_PARM_DESC(vf_max_tx_channels, | |
177 | "Limit the number of TX channels VFs can use"); | |
178 | ||
179 | static int max_vfs = -1; | |
180 | module_param(max_vfs, int, 0444); | |
181 | MODULE_PARM_DESC(max_vfs, | |
182 | "Reduce the number of VFs initialized by the driver"); | |
183 | ||
184 | /* Workqueue used by VFDI communication. We can't use the global | |
185 | * workqueue because it may be running the VF driver's probe() | |
186 | * routine, which will be blocked there waiting for a VFDI response. | |
187 | */ | |
188 | static struct workqueue_struct *vfdi_workqueue; | |
189 | ||
bf3d0156 | 190 | static unsigned abs_index(struct siena_vf *vf, unsigned index) |
cd2d5b52 BH |
191 | { |
192 | return EFX_VI_BASE + vf->index * efx_vf_size(vf->efx) + index; | |
193 | } | |
194 | ||
327c685e SS |
195 | static int efx_siena_sriov_cmd(struct efx_nic *efx, bool enable, |
196 | unsigned *vi_scale_out, unsigned *vf_total_out) | |
cd2d5b52 | 197 | { |
59cfc479 BH |
198 | MCDI_DECLARE_BUF(inbuf, MC_CMD_SRIOV_IN_LEN); |
199 | MCDI_DECLARE_BUF(outbuf, MC_CMD_SRIOV_OUT_LEN); | |
cd2d5b52 BH |
200 | unsigned vi_scale, vf_total; |
201 | size_t outlen; | |
202 | int rc; | |
203 | ||
204 | MCDI_SET_DWORD(inbuf, SRIOV_IN_ENABLE, enable ? 1 : 0); | |
205 | MCDI_SET_DWORD(inbuf, SRIOV_IN_VI_BASE, EFX_VI_BASE); | |
206 | MCDI_SET_DWORD(inbuf, SRIOV_IN_VF_COUNT, efx->vf_count); | |
207 | ||
7e91a210 EC |
208 | rc = efx_mcdi_rpc_quiet(efx, MC_CMD_SRIOV, inbuf, MC_CMD_SRIOV_IN_LEN, |
209 | outbuf, MC_CMD_SRIOV_OUT_LEN, &outlen); | |
cd2d5b52 BH |
210 | if (rc) |
211 | return rc; | |
212 | if (outlen < MC_CMD_SRIOV_OUT_LEN) | |
213 | return -EIO; | |
214 | ||
215 | vf_total = MCDI_DWORD(outbuf, SRIOV_OUT_VF_TOTAL); | |
216 | vi_scale = MCDI_DWORD(outbuf, SRIOV_OUT_VI_SCALE); | |
217 | if (vi_scale > EFX_VI_SCALE_MAX) | |
218 | return -EOPNOTSUPP; | |
219 | ||
220 | if (vi_scale_out) | |
221 | *vi_scale_out = vi_scale; | |
222 | if (vf_total_out) | |
223 | *vf_total_out = vf_total; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
327c685e | 228 | static void efx_siena_sriov_usrev(struct efx_nic *efx, bool enabled) |
cd2d5b52 | 229 | { |
2dc313ec | 230 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
231 | efx_oword_t reg; |
232 | ||
233 | EFX_POPULATE_OWORD_2(reg, | |
234 | FRF_CZ_USREV_DIS, enabled ? 0 : 1, | |
2dc313ec | 235 | FRF_CZ_DFLT_EVQ, nic_data->vfdi_channel->channel); |
cd2d5b52 BH |
236 | efx_writeo(efx, ®, FR_CZ_USR_EV_CFG); |
237 | } | |
238 | ||
327c685e SS |
239 | static int efx_siena_sriov_memcpy(struct efx_nic *efx, |
240 | struct efx_memcpy_req *req, | |
241 | unsigned int count) | |
cd2d5b52 | 242 | { |
c5bb0e98 BH |
243 | MCDI_DECLARE_BUF(inbuf, MCDI_CTL_SDU_LEN_MAX_V1); |
244 | MCDI_DECLARE_STRUCT_PTR(record); | |
245 | unsigned int index, used; | |
338f74df BH |
246 | u64 from_addr; |
247 | u32 from_rid; | |
cd2d5b52 BH |
248 | int rc; |
249 | ||
250 | mb(); /* Finish writing source/reading dest before DMA starts */ | |
251 | ||
c5bb0e98 | 252 | if (WARN_ON(count > MC_CMD_MEMCPY_IN_RECORD_MAXNUM)) |
cd2d5b52 | 253 | return -ENOBUFS; |
c5bb0e98 | 254 | used = MC_CMD_MEMCPY_IN_LEN(count); |
cd2d5b52 | 255 | |
c5bb0e98 BH |
256 | for (index = 0; index < count; index++) { |
257 | record = MCDI_ARRAY_STRUCT_PTR(inbuf, MEMCPY_IN_RECORD, index); | |
258 | MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_NUM_RECORDS, | |
259 | count); | |
cd2d5b52 BH |
260 | MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_TO_RID, |
261 | req->to_rid); | |
338f74df BH |
262 | MCDI_SET_QWORD(record, MEMCPY_RECORD_TYPEDEF_TO_ADDR, |
263 | req->to_addr); | |
cd2d5b52 BH |
264 | if (req->from_buf == NULL) { |
265 | from_rid = req->from_rid; | |
338f74df | 266 | from_addr = req->from_addr; |
cd2d5b52 | 267 | } else { |
d0c2ee99 BH |
268 | if (WARN_ON(used + req->length > |
269 | MCDI_CTL_SDU_LEN_MAX_V1)) { | |
cd2d5b52 BH |
270 | rc = -ENOBUFS; |
271 | goto out; | |
272 | } | |
273 | ||
274 | from_rid = MC_CMD_MEMCPY_RECORD_TYPEDEF_RID_INLINE; | |
338f74df | 275 | from_addr = used; |
c5bb0e98 BH |
276 | memcpy(_MCDI_PTR(inbuf, used), req->from_buf, |
277 | req->length); | |
cd2d5b52 BH |
278 | used += req->length; |
279 | } | |
280 | ||
281 | MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_FROM_RID, from_rid); | |
338f74df BH |
282 | MCDI_SET_QWORD(record, MEMCPY_RECORD_TYPEDEF_FROM_ADDR, |
283 | from_addr); | |
cd2d5b52 BH |
284 | MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_LENGTH, |
285 | req->length); | |
286 | ||
287 | ++req; | |
cd2d5b52 BH |
288 | } |
289 | ||
290 | rc = efx_mcdi_rpc(efx, MC_CMD_MEMCPY, inbuf, used, NULL, 0, NULL); | |
291 | out: | |
cd2d5b52 BH |
292 | mb(); /* Don't write source/read dest before DMA is complete */ |
293 | ||
294 | return rc; | |
295 | } | |
296 | ||
297 | /* The TX filter is entirely controlled by this driver, and is modified | |
298 | * underneath the feet of the VF | |
299 | */ | |
bf3d0156 | 300 | static void efx_siena_sriov_reset_tx_filter(struct siena_vf *vf) |
cd2d5b52 BH |
301 | { |
302 | struct efx_nic *efx = vf->efx; | |
303 | struct efx_filter_spec filter; | |
304 | u16 vlan; | |
305 | int rc; | |
306 | ||
307 | if (vf->tx_filter_id != -1) { | |
308 | efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, | |
309 | vf->tx_filter_id); | |
310 | netif_dbg(efx, hw, efx->net_dev, "Removed vf %s tx filter %d\n", | |
311 | vf->pci_name, vf->tx_filter_id); | |
312 | vf->tx_filter_id = -1; | |
313 | } | |
314 | ||
315 | if (is_zero_ether_addr(vf->addr.mac_addr)) | |
316 | return; | |
317 | ||
318 | /* Turn on TX filtering automatically if not explicitly | |
319 | * enabled or disabled. | |
320 | */ | |
321 | if (vf->tx_filter_mode == VF_TX_FILTER_AUTO && vf_max_tx_channels <= 2) | |
322 | vf->tx_filter_mode = VF_TX_FILTER_ON; | |
323 | ||
324 | vlan = ntohs(vf->addr.tci) & VLAN_VID_MASK; | |
325 | efx_filter_init_tx(&filter, abs_index(vf, 0)); | |
326 | rc = efx_filter_set_eth_local(&filter, | |
327 | vlan ? vlan : EFX_FILTER_VID_UNSPEC, | |
328 | vf->addr.mac_addr); | |
329 | BUG_ON(rc); | |
330 | ||
331 | rc = efx_filter_insert_filter(efx, &filter, true); | |
332 | if (rc < 0) { | |
333 | netif_warn(efx, hw, efx->net_dev, | |
334 | "Unable to migrate tx filter for vf %s\n", | |
335 | vf->pci_name); | |
336 | } else { | |
337 | netif_dbg(efx, hw, efx->net_dev, "Inserted vf %s tx filter %d\n", | |
338 | vf->pci_name, rc); | |
339 | vf->tx_filter_id = rc; | |
340 | } | |
341 | } | |
342 | ||
343 | /* The RX filter is managed here on behalf of the VF driver */ | |
bf3d0156 | 344 | static void efx_siena_sriov_reset_rx_filter(struct siena_vf *vf) |
cd2d5b52 BH |
345 | { |
346 | struct efx_nic *efx = vf->efx; | |
347 | struct efx_filter_spec filter; | |
348 | u16 vlan; | |
349 | int rc; | |
350 | ||
351 | if (vf->rx_filter_id != -1) { | |
352 | efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, | |
353 | vf->rx_filter_id); | |
354 | netif_dbg(efx, hw, efx->net_dev, "Removed vf %s rx filter %d\n", | |
355 | vf->pci_name, vf->rx_filter_id); | |
356 | vf->rx_filter_id = -1; | |
357 | } | |
358 | ||
359 | if (!vf->rx_filtering || is_zero_ether_addr(vf->addr.mac_addr)) | |
360 | return; | |
361 | ||
362 | vlan = ntohs(vf->addr.tci) & VLAN_VID_MASK; | |
363 | efx_filter_init_rx(&filter, EFX_FILTER_PRI_REQUIRED, | |
364 | vf->rx_filter_flags, | |
365 | abs_index(vf, vf->rx_filter_qid)); | |
366 | rc = efx_filter_set_eth_local(&filter, | |
367 | vlan ? vlan : EFX_FILTER_VID_UNSPEC, | |
368 | vf->addr.mac_addr); | |
369 | BUG_ON(rc); | |
370 | ||
371 | rc = efx_filter_insert_filter(efx, &filter, true); | |
372 | if (rc < 0) { | |
373 | netif_warn(efx, hw, efx->net_dev, | |
374 | "Unable to insert rx filter for vf %s\n", | |
375 | vf->pci_name); | |
376 | } else { | |
377 | netif_dbg(efx, hw, efx->net_dev, "Inserted vf %s rx filter %d\n", | |
378 | vf->pci_name, rc); | |
379 | vf->rx_filter_id = rc; | |
380 | } | |
381 | } | |
382 | ||
bf3d0156 | 383 | static void __efx_siena_sriov_update_vf_addr(struct siena_vf *vf) |
cd2d5b52 | 384 | { |
2dc313ec SS |
385 | struct efx_nic *efx = vf->efx; |
386 | struct siena_nic_data *nic_data = efx->nic_data; | |
387 | ||
327c685e SS |
388 | efx_siena_sriov_reset_tx_filter(vf); |
389 | efx_siena_sriov_reset_rx_filter(vf); | |
2dc313ec | 390 | queue_work(vfdi_workqueue, &nic_data->peer_work); |
cd2d5b52 BH |
391 | } |
392 | ||
393 | /* Push the peer list to this VF. The caller must hold status_lock to interlock | |
394 | * with VFDI requests, and they must be serialised against manipulation of | |
395 | * local_page_list, either by acquiring local_lock or by running from | |
327c685e | 396 | * efx_siena_sriov_peer_work() |
cd2d5b52 | 397 | */ |
bf3d0156 | 398 | static void __efx_siena_sriov_push_vf_status(struct siena_vf *vf) |
cd2d5b52 BH |
399 | { |
400 | struct efx_nic *efx = vf->efx; | |
2dc313ec SS |
401 | struct siena_nic_data *nic_data = efx->nic_data; |
402 | struct vfdi_status *status = nic_data->vfdi_status.addr; | |
cd2d5b52 BH |
403 | struct efx_memcpy_req copy[4]; |
404 | struct efx_endpoint_page *epp; | |
405 | unsigned int pos, count; | |
406 | unsigned data_offset; | |
407 | efx_qword_t event; | |
408 | ||
409 | WARN_ON(!mutex_is_locked(&vf->status_lock)); | |
410 | WARN_ON(!vf->status_addr); | |
411 | ||
412 | status->local = vf->addr; | |
413 | status->generation_end = ++status->generation_start; | |
414 | ||
415 | memset(copy, '\0', sizeof(copy)); | |
416 | /* Write generation_start */ | |
417 | copy[0].from_buf = &status->generation_start; | |
418 | copy[0].to_rid = vf->pci_rid; | |
419 | copy[0].to_addr = vf->status_addr + offsetof(struct vfdi_status, | |
420 | generation_start); | |
421 | copy[0].length = sizeof(status->generation_start); | |
422 | /* DMA the rest of the structure (excluding the generations). This | |
423 | * assumes that the non-generation portion of vfdi_status is in | |
424 | * one chunk starting at the version member. | |
425 | */ | |
426 | data_offset = offsetof(struct vfdi_status, version); | |
427 | copy[1].from_rid = efx->pci_dev->devfn; | |
2dc313ec | 428 | copy[1].from_addr = nic_data->vfdi_status.dma_addr + data_offset; |
cd2d5b52 BH |
429 | copy[1].to_rid = vf->pci_rid; |
430 | copy[1].to_addr = vf->status_addr + data_offset; | |
431 | copy[1].length = status->length - data_offset; | |
432 | ||
433 | /* Copy the peer pages */ | |
434 | pos = 2; | |
435 | count = 0; | |
2dc313ec | 436 | list_for_each_entry(epp, &nic_data->local_page_list, link) { |
cd2d5b52 BH |
437 | if (count == vf->peer_page_count) { |
438 | /* The VF driver will know they need to provide more | |
439 | * pages because peer_addr_count is too large. | |
440 | */ | |
441 | break; | |
442 | } | |
443 | copy[pos].from_buf = NULL; | |
444 | copy[pos].from_rid = efx->pci_dev->devfn; | |
445 | copy[pos].from_addr = epp->addr; | |
446 | copy[pos].to_rid = vf->pci_rid; | |
447 | copy[pos].to_addr = vf->peer_page_addrs[count]; | |
448 | copy[pos].length = EFX_PAGE_SIZE; | |
449 | ||
450 | if (++pos == ARRAY_SIZE(copy)) { | |
327c685e | 451 | efx_siena_sriov_memcpy(efx, copy, ARRAY_SIZE(copy)); |
cd2d5b52 BH |
452 | pos = 0; |
453 | } | |
454 | ++count; | |
455 | } | |
456 | ||
457 | /* Write generation_end */ | |
458 | copy[pos].from_buf = &status->generation_end; | |
459 | copy[pos].to_rid = vf->pci_rid; | |
460 | copy[pos].to_addr = vf->status_addr + offsetof(struct vfdi_status, | |
461 | generation_end); | |
462 | copy[pos].length = sizeof(status->generation_end); | |
327c685e | 463 | efx_siena_sriov_memcpy(efx, copy, pos + 1); |
cd2d5b52 BH |
464 | |
465 | /* Notify the guest */ | |
466 | EFX_POPULATE_QWORD_3(event, | |
467 | FSF_AZ_EV_CODE, FSE_CZ_EV_CODE_USER_EV, | |
468 | VFDI_EV_SEQ, (vf->msg_seqno & 0xff), | |
469 | VFDI_EV_TYPE, VFDI_EV_TYPE_STATUS); | |
470 | ++vf->msg_seqno; | |
86094f7f BH |
471 | efx_farch_generate_event(efx, |
472 | EFX_VI_BASE + vf->index * efx_vf_size(efx), | |
473 | &event); | |
cd2d5b52 BH |
474 | } |
475 | ||
327c685e SS |
476 | static void efx_siena_sriov_bufs(struct efx_nic *efx, unsigned offset, |
477 | u64 *addr, unsigned count) | |
cd2d5b52 BH |
478 | { |
479 | efx_qword_t buf; | |
480 | unsigned pos; | |
481 | ||
482 | for (pos = 0; pos < count; ++pos) { | |
483 | EFX_POPULATE_QWORD_3(buf, | |
484 | FRF_AZ_BUF_ADR_REGION, 0, | |
485 | FRF_AZ_BUF_ADR_FBUF, | |
486 | addr ? addr[pos] >> 12 : 0, | |
487 | FRF_AZ_BUF_OWNER_ID_FBUF, 0); | |
488 | efx_sram_writeq(efx, efx->membase + FR_BZ_BUF_FULL_TBL, | |
489 | &buf, offset + pos); | |
490 | } | |
491 | } | |
492 | ||
493 | static bool bad_vf_index(struct efx_nic *efx, unsigned index) | |
494 | { | |
495 | return index >= efx_vf_size(efx); | |
496 | } | |
497 | ||
498 | static bool bad_buf_count(unsigned buf_count, unsigned max_entry_count) | |
499 | { | |
500 | unsigned max_buf_count = max_entry_count * | |
501 | sizeof(efx_qword_t) / EFX_BUF_SIZE; | |
502 | ||
503 | return ((buf_count & (buf_count - 1)) || buf_count > max_buf_count); | |
504 | } | |
505 | ||
506 | /* Check that VI specified by per-port index belongs to a VF. | |
507 | * Optionally set VF index and VI index within the VF. | |
508 | */ | |
509 | static bool map_vi_index(struct efx_nic *efx, unsigned abs_index, | |
bf3d0156 | 510 | struct siena_vf **vf_out, unsigned *rel_index_out) |
cd2d5b52 | 511 | { |
bf3d0156 | 512 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
513 | unsigned vf_i; |
514 | ||
515 | if (abs_index < EFX_VI_BASE) | |
516 | return true; | |
2c61c8a7 | 517 | vf_i = (abs_index - EFX_VI_BASE) / efx_vf_size(efx); |
cd2d5b52 BH |
518 | if (vf_i >= efx->vf_init_count) |
519 | return true; | |
520 | ||
521 | if (vf_out) | |
bf3d0156 | 522 | *vf_out = nic_data->vf + vf_i; |
cd2d5b52 BH |
523 | if (rel_index_out) |
524 | *rel_index_out = abs_index % efx_vf_size(efx); | |
525 | return false; | |
526 | } | |
527 | ||
bf3d0156 | 528 | static int efx_vfdi_init_evq(struct siena_vf *vf) |
cd2d5b52 BH |
529 | { |
530 | struct efx_nic *efx = vf->efx; | |
531 | struct vfdi_req *req = vf->buf.addr; | |
532 | unsigned vf_evq = req->u.init_evq.index; | |
533 | unsigned buf_count = req->u.init_evq.buf_count; | |
534 | unsigned abs_evq = abs_index(vf, vf_evq); | |
535 | unsigned buftbl = EFX_BUFTBL_EVQ_BASE(vf, vf_evq); | |
536 | efx_oword_t reg; | |
537 | ||
538 | if (bad_vf_index(efx, vf_evq) || | |
539 | bad_buf_count(buf_count, EFX_MAX_VF_EVQ_SIZE)) { | |
540 | if (net_ratelimit()) | |
541 | netif_err(efx, hw, efx->net_dev, | |
542 | "ERROR: Invalid INIT_EVQ from %s: evq %d bufs %d\n", | |
543 | vf->pci_name, vf_evq, buf_count); | |
544 | return VFDI_RC_EINVAL; | |
545 | } | |
546 | ||
327c685e | 547 | efx_siena_sriov_bufs(efx, buftbl, req->u.init_evq.addr, buf_count); |
cd2d5b52 BH |
548 | |
549 | EFX_POPULATE_OWORD_3(reg, | |
550 | FRF_CZ_TIMER_Q_EN, 1, | |
551 | FRF_CZ_HOST_NOTIFY_MODE, 0, | |
552 | FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS); | |
553 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, abs_evq); | |
554 | EFX_POPULATE_OWORD_3(reg, | |
555 | FRF_AZ_EVQ_EN, 1, | |
556 | FRF_AZ_EVQ_SIZE, __ffs(buf_count), | |
557 | FRF_AZ_EVQ_BUF_BASE_ID, buftbl); | |
558 | efx_writeo_table(efx, ®, FR_BZ_EVQ_PTR_TBL, abs_evq); | |
559 | ||
560 | if (vf_evq == 0) { | |
561 | memcpy(vf->evq0_addrs, req->u.init_evq.addr, | |
562 | buf_count * sizeof(u64)); | |
563 | vf->evq0_count = buf_count; | |
564 | } | |
565 | ||
566 | return VFDI_RC_SUCCESS; | |
567 | } | |
568 | ||
bf3d0156 | 569 | static int efx_vfdi_init_rxq(struct siena_vf *vf) |
cd2d5b52 BH |
570 | { |
571 | struct efx_nic *efx = vf->efx; | |
572 | struct vfdi_req *req = vf->buf.addr; | |
573 | unsigned vf_rxq = req->u.init_rxq.index; | |
574 | unsigned vf_evq = req->u.init_rxq.evq; | |
575 | unsigned buf_count = req->u.init_rxq.buf_count; | |
576 | unsigned buftbl = EFX_BUFTBL_RXQ_BASE(vf, vf_rxq); | |
577 | unsigned label; | |
578 | efx_oword_t reg; | |
579 | ||
580 | if (bad_vf_index(efx, vf_evq) || bad_vf_index(efx, vf_rxq) || | |
45078374 | 581 | vf_rxq >= VF_MAX_RX_QUEUES || |
cd2d5b52 BH |
582 | bad_buf_count(buf_count, EFX_MAX_DMAQ_SIZE)) { |
583 | if (net_ratelimit()) | |
584 | netif_err(efx, hw, efx->net_dev, | |
585 | "ERROR: Invalid INIT_RXQ from %s: rxq %d evq %d " | |
586 | "buf_count %d\n", vf->pci_name, vf_rxq, | |
587 | vf_evq, buf_count); | |
588 | return VFDI_RC_EINVAL; | |
589 | } | |
590 | if (__test_and_set_bit(req->u.init_rxq.index, vf->rxq_mask)) | |
591 | ++vf->rxq_count; | |
327c685e | 592 | efx_siena_sriov_bufs(efx, buftbl, req->u.init_rxq.addr, buf_count); |
cd2d5b52 BH |
593 | |
594 | label = req->u.init_rxq.label & EFX_FIELD_MASK(FRF_AZ_RX_DESCQ_LABEL); | |
595 | EFX_POPULATE_OWORD_6(reg, | |
596 | FRF_AZ_RX_DESCQ_BUF_BASE_ID, buftbl, | |
597 | FRF_AZ_RX_DESCQ_EVQ_ID, abs_index(vf, vf_evq), | |
598 | FRF_AZ_RX_DESCQ_LABEL, label, | |
599 | FRF_AZ_RX_DESCQ_SIZE, __ffs(buf_count), | |
600 | FRF_AZ_RX_DESCQ_JUMBO, | |
601 | !!(req->u.init_rxq.flags & | |
602 | VFDI_RXQ_FLAG_SCATTER_EN), | |
603 | FRF_AZ_RX_DESCQ_EN, 1); | |
604 | efx_writeo_table(efx, ®, FR_BZ_RX_DESC_PTR_TBL, | |
605 | abs_index(vf, vf_rxq)); | |
606 | ||
607 | return VFDI_RC_SUCCESS; | |
608 | } | |
609 | ||
bf3d0156 | 610 | static int efx_vfdi_init_txq(struct siena_vf *vf) |
cd2d5b52 BH |
611 | { |
612 | struct efx_nic *efx = vf->efx; | |
613 | struct vfdi_req *req = vf->buf.addr; | |
614 | unsigned vf_txq = req->u.init_txq.index; | |
615 | unsigned vf_evq = req->u.init_txq.evq; | |
616 | unsigned buf_count = req->u.init_txq.buf_count; | |
617 | unsigned buftbl = EFX_BUFTBL_TXQ_BASE(vf, vf_txq); | |
618 | unsigned label, eth_filt_en; | |
619 | efx_oword_t reg; | |
620 | ||
621 | if (bad_vf_index(efx, vf_evq) || bad_vf_index(efx, vf_txq) || | |
622 | vf_txq >= vf_max_tx_channels || | |
623 | bad_buf_count(buf_count, EFX_MAX_DMAQ_SIZE)) { | |
624 | if (net_ratelimit()) | |
625 | netif_err(efx, hw, efx->net_dev, | |
626 | "ERROR: Invalid INIT_TXQ from %s: txq %d evq %d " | |
627 | "buf_count %d\n", vf->pci_name, vf_txq, | |
628 | vf_evq, buf_count); | |
629 | return VFDI_RC_EINVAL; | |
630 | } | |
631 | ||
632 | mutex_lock(&vf->txq_lock); | |
633 | if (__test_and_set_bit(req->u.init_txq.index, vf->txq_mask)) | |
634 | ++vf->txq_count; | |
635 | mutex_unlock(&vf->txq_lock); | |
327c685e | 636 | efx_siena_sriov_bufs(efx, buftbl, req->u.init_txq.addr, buf_count); |
cd2d5b52 BH |
637 | |
638 | eth_filt_en = vf->tx_filter_mode == VF_TX_FILTER_ON; | |
639 | ||
640 | label = req->u.init_txq.label & EFX_FIELD_MASK(FRF_AZ_TX_DESCQ_LABEL); | |
641 | EFX_POPULATE_OWORD_8(reg, | |
642 | FRF_CZ_TX_DPT_Q_MASK_WIDTH, min(efx->vi_scale, 1U), | |
643 | FRF_CZ_TX_DPT_ETH_FILT_EN, eth_filt_en, | |
644 | FRF_AZ_TX_DESCQ_EN, 1, | |
645 | FRF_AZ_TX_DESCQ_BUF_BASE_ID, buftbl, | |
646 | FRF_AZ_TX_DESCQ_EVQ_ID, abs_index(vf, vf_evq), | |
647 | FRF_AZ_TX_DESCQ_LABEL, label, | |
648 | FRF_AZ_TX_DESCQ_SIZE, __ffs(buf_count), | |
649 | FRF_BZ_TX_NON_IP_DROP_DIS, 1); | |
650 | efx_writeo_table(efx, ®, FR_BZ_TX_DESC_PTR_TBL, | |
651 | abs_index(vf, vf_txq)); | |
652 | ||
653 | return VFDI_RC_SUCCESS; | |
654 | } | |
655 | ||
656 | /* Returns true when efx_vfdi_fini_all_queues should wake */ | |
bf3d0156 | 657 | static bool efx_vfdi_flush_wake(struct siena_vf *vf) |
cd2d5b52 BH |
658 | { |
659 | /* Ensure that all updates are visible to efx_vfdi_fini_all_queues() */ | |
660 | smp_mb(); | |
661 | ||
662 | return (!vf->txq_count && !vf->rxq_count) || | |
663 | atomic_read(&vf->rxq_retry_count); | |
664 | } | |
665 | ||
bf3d0156 | 666 | static void efx_vfdi_flush_clear(struct siena_vf *vf) |
cd2d5b52 BH |
667 | { |
668 | memset(vf->txq_mask, 0, sizeof(vf->txq_mask)); | |
669 | vf->txq_count = 0; | |
670 | memset(vf->rxq_mask, 0, sizeof(vf->rxq_mask)); | |
671 | vf->rxq_count = 0; | |
672 | memset(vf->rxq_retry_mask, 0, sizeof(vf->rxq_retry_mask)); | |
673 | atomic_set(&vf->rxq_retry_count, 0); | |
674 | } | |
675 | ||
bf3d0156 | 676 | static int efx_vfdi_fini_all_queues(struct siena_vf *vf) |
cd2d5b52 BH |
677 | { |
678 | struct efx_nic *efx = vf->efx; | |
679 | efx_oword_t reg; | |
680 | unsigned count = efx_vf_size(efx); | |
681 | unsigned vf_offset = EFX_VI_BASE + vf->index * efx_vf_size(efx); | |
682 | unsigned timeout = HZ; | |
683 | unsigned index, rxqs_count; | |
c5bb0e98 | 684 | MCDI_DECLARE_BUF(inbuf, MC_CMD_FLUSH_RX_QUEUES_IN_LENMAX); |
cd2d5b52 BH |
685 | int rc; |
686 | ||
45078374 BH |
687 | BUILD_BUG_ON(VF_MAX_RX_QUEUES > |
688 | MC_CMD_FLUSH_RX_QUEUES_IN_QID_OFST_MAXNUM); | |
689 | ||
cd2d5b52 | 690 | rtnl_lock(); |
d5e8cc6c | 691 | siena_prepare_flush(efx); |
cd2d5b52 BH |
692 | rtnl_unlock(); |
693 | ||
694 | /* Flush all the initialized queues */ | |
695 | rxqs_count = 0; | |
696 | for (index = 0; index < count; ++index) { | |
697 | if (test_bit(index, vf->txq_mask)) { | |
698 | EFX_POPULATE_OWORD_2(reg, | |
699 | FRF_AZ_TX_FLUSH_DESCQ_CMD, 1, | |
700 | FRF_AZ_TX_FLUSH_DESCQ, | |
701 | vf_offset + index); | |
702 | efx_writeo(efx, ®, FR_AZ_TX_FLUSH_DESCQ); | |
703 | } | |
c5bb0e98 BH |
704 | if (test_bit(index, vf->rxq_mask)) { |
705 | MCDI_SET_ARRAY_DWORD( | |
706 | inbuf, FLUSH_RX_QUEUES_IN_QID_OFST, | |
707 | rxqs_count, vf_offset + index); | |
708 | rxqs_count++; | |
709 | } | |
cd2d5b52 BH |
710 | } |
711 | ||
712 | atomic_set(&vf->rxq_retry_count, 0); | |
713 | while (timeout && (vf->rxq_count || vf->txq_count)) { | |
c5bb0e98 BH |
714 | rc = efx_mcdi_rpc(efx, MC_CMD_FLUSH_RX_QUEUES, inbuf, |
715 | MC_CMD_FLUSH_RX_QUEUES_IN_LEN(rxqs_count), | |
716 | NULL, 0, NULL); | |
cd2d5b52 BH |
717 | WARN_ON(rc < 0); |
718 | ||
719 | timeout = wait_event_timeout(vf->flush_waitq, | |
720 | efx_vfdi_flush_wake(vf), | |
721 | timeout); | |
722 | rxqs_count = 0; | |
723 | for (index = 0; index < count; ++index) { | |
724 | if (test_and_clear_bit(index, vf->rxq_retry_mask)) { | |
725 | atomic_dec(&vf->rxq_retry_count); | |
c5bb0e98 BH |
726 | MCDI_SET_ARRAY_DWORD( |
727 | inbuf, FLUSH_RX_QUEUES_IN_QID_OFST, | |
728 | rxqs_count, vf_offset + index); | |
729 | rxqs_count++; | |
cd2d5b52 BH |
730 | } |
731 | } | |
732 | } | |
733 | ||
734 | rtnl_lock(); | |
d5e8cc6c | 735 | siena_finish_flush(efx); |
cd2d5b52 BH |
736 | rtnl_unlock(); |
737 | ||
738 | /* Irrespective of success/failure, fini the queues */ | |
739 | EFX_ZERO_OWORD(reg); | |
740 | for (index = 0; index < count; ++index) { | |
741 | efx_writeo_table(efx, ®, FR_BZ_RX_DESC_PTR_TBL, | |
742 | vf_offset + index); | |
743 | efx_writeo_table(efx, ®, FR_BZ_TX_DESC_PTR_TBL, | |
744 | vf_offset + index); | |
745 | efx_writeo_table(efx, ®, FR_BZ_EVQ_PTR_TBL, | |
746 | vf_offset + index); | |
747 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, | |
748 | vf_offset + index); | |
749 | } | |
327c685e SS |
750 | efx_siena_sriov_bufs(efx, vf->buftbl_base, NULL, |
751 | EFX_VF_BUFTBL_PER_VI * efx_vf_size(efx)); | |
cd2d5b52 BH |
752 | efx_vfdi_flush_clear(vf); |
753 | ||
754 | vf->evq0_count = 0; | |
755 | ||
756 | return timeout ? 0 : VFDI_RC_ETIMEDOUT; | |
757 | } | |
758 | ||
bf3d0156 | 759 | static int efx_vfdi_insert_filter(struct siena_vf *vf) |
cd2d5b52 BH |
760 | { |
761 | struct efx_nic *efx = vf->efx; | |
2dc313ec | 762 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
763 | struct vfdi_req *req = vf->buf.addr; |
764 | unsigned vf_rxq = req->u.mac_filter.rxq; | |
765 | unsigned flags; | |
766 | ||
767 | if (bad_vf_index(efx, vf_rxq) || vf->rx_filtering) { | |
768 | if (net_ratelimit()) | |
769 | netif_err(efx, hw, efx->net_dev, | |
770 | "ERROR: Invalid INSERT_FILTER from %s: rxq %d " | |
771 | "flags 0x%x\n", vf->pci_name, vf_rxq, | |
772 | req->u.mac_filter.flags); | |
773 | return VFDI_RC_EINVAL; | |
774 | } | |
775 | ||
776 | flags = 0; | |
777 | if (req->u.mac_filter.flags & VFDI_MAC_FILTER_FLAG_RSS) | |
778 | flags |= EFX_FILTER_FLAG_RX_RSS; | |
779 | if (req->u.mac_filter.flags & VFDI_MAC_FILTER_FLAG_SCATTER) | |
780 | flags |= EFX_FILTER_FLAG_RX_SCATTER; | |
781 | vf->rx_filter_flags = flags; | |
782 | vf->rx_filter_qid = vf_rxq; | |
783 | vf->rx_filtering = true; | |
784 | ||
327c685e | 785 | efx_siena_sriov_reset_rx_filter(vf); |
2dc313ec | 786 | queue_work(vfdi_workqueue, &nic_data->peer_work); |
cd2d5b52 BH |
787 | |
788 | return VFDI_RC_SUCCESS; | |
789 | } | |
790 | ||
bf3d0156 | 791 | static int efx_vfdi_remove_all_filters(struct siena_vf *vf) |
cd2d5b52 | 792 | { |
2dc313ec SS |
793 | struct efx_nic *efx = vf->efx; |
794 | struct siena_nic_data *nic_data = efx->nic_data; | |
795 | ||
cd2d5b52 | 796 | vf->rx_filtering = false; |
327c685e | 797 | efx_siena_sriov_reset_rx_filter(vf); |
2dc313ec | 798 | queue_work(vfdi_workqueue, &nic_data->peer_work); |
cd2d5b52 BH |
799 | |
800 | return VFDI_RC_SUCCESS; | |
801 | } | |
802 | ||
bf3d0156 | 803 | static int efx_vfdi_set_status_page(struct siena_vf *vf) |
cd2d5b52 BH |
804 | { |
805 | struct efx_nic *efx = vf->efx; | |
2dc313ec | 806 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 | 807 | struct vfdi_req *req = vf->buf.addr; |
01cb543d BH |
808 | u64 page_count = req->u.set_status_page.peer_page_count; |
809 | u64 max_page_count = | |
810 | (EFX_PAGE_SIZE - | |
811 | offsetof(struct vfdi_req, u.set_status_page.peer_page_addr[0])) | |
812 | / sizeof(req->u.set_status_page.peer_page_addr[0]); | |
cd2d5b52 | 813 | |
01cb543d | 814 | if (!req->u.set_status_page.dma_addr || page_count > max_page_count) { |
cd2d5b52 BH |
815 | if (net_ratelimit()) |
816 | netif_err(efx, hw, efx->net_dev, | |
817 | "ERROR: Invalid SET_STATUS_PAGE from %s\n", | |
818 | vf->pci_name); | |
819 | return VFDI_RC_EINVAL; | |
820 | } | |
821 | ||
2dc313ec | 822 | mutex_lock(&nic_data->local_lock); |
cd2d5b52 BH |
823 | mutex_lock(&vf->status_lock); |
824 | vf->status_addr = req->u.set_status_page.dma_addr; | |
825 | ||
826 | kfree(vf->peer_page_addrs); | |
827 | vf->peer_page_addrs = NULL; | |
828 | vf->peer_page_count = 0; | |
829 | ||
830 | if (page_count) { | |
831 | vf->peer_page_addrs = kcalloc(page_count, sizeof(u64), | |
832 | GFP_KERNEL); | |
833 | if (vf->peer_page_addrs) { | |
834 | memcpy(vf->peer_page_addrs, | |
835 | req->u.set_status_page.peer_page_addr, | |
836 | page_count * sizeof(u64)); | |
837 | vf->peer_page_count = page_count; | |
838 | } | |
839 | } | |
840 | ||
327c685e | 841 | __efx_siena_sriov_push_vf_status(vf); |
cd2d5b52 | 842 | mutex_unlock(&vf->status_lock); |
2dc313ec | 843 | mutex_unlock(&nic_data->local_lock); |
cd2d5b52 BH |
844 | |
845 | return VFDI_RC_SUCCESS; | |
846 | } | |
847 | ||
bf3d0156 | 848 | static int efx_vfdi_clear_status_page(struct siena_vf *vf) |
cd2d5b52 BH |
849 | { |
850 | mutex_lock(&vf->status_lock); | |
851 | vf->status_addr = 0; | |
852 | mutex_unlock(&vf->status_lock); | |
853 | ||
854 | return VFDI_RC_SUCCESS; | |
855 | } | |
856 | ||
bf3d0156 | 857 | typedef int (*efx_vfdi_op_t)(struct siena_vf *vf); |
cd2d5b52 BH |
858 | |
859 | static const efx_vfdi_op_t vfdi_ops[VFDI_OP_LIMIT] = { | |
860 | [VFDI_OP_INIT_EVQ] = efx_vfdi_init_evq, | |
861 | [VFDI_OP_INIT_TXQ] = efx_vfdi_init_txq, | |
862 | [VFDI_OP_INIT_RXQ] = efx_vfdi_init_rxq, | |
863 | [VFDI_OP_FINI_ALL_QUEUES] = efx_vfdi_fini_all_queues, | |
864 | [VFDI_OP_INSERT_FILTER] = efx_vfdi_insert_filter, | |
865 | [VFDI_OP_REMOVE_ALL_FILTERS] = efx_vfdi_remove_all_filters, | |
866 | [VFDI_OP_SET_STATUS_PAGE] = efx_vfdi_set_status_page, | |
867 | [VFDI_OP_CLEAR_STATUS_PAGE] = efx_vfdi_clear_status_page, | |
868 | }; | |
869 | ||
327c685e | 870 | static void efx_siena_sriov_vfdi(struct work_struct *work) |
cd2d5b52 | 871 | { |
bf3d0156 | 872 | struct siena_vf *vf = container_of(work, struct siena_vf, req); |
cd2d5b52 BH |
873 | struct efx_nic *efx = vf->efx; |
874 | struct vfdi_req *req = vf->buf.addr; | |
875 | struct efx_memcpy_req copy[2]; | |
876 | int rc; | |
877 | ||
878 | /* Copy this page into the local address space */ | |
879 | memset(copy, '\0', sizeof(copy)); | |
880 | copy[0].from_rid = vf->pci_rid; | |
881 | copy[0].from_addr = vf->req_addr; | |
882 | copy[0].to_rid = efx->pci_dev->devfn; | |
883 | copy[0].to_addr = vf->buf.dma_addr; | |
884 | copy[0].length = EFX_PAGE_SIZE; | |
327c685e | 885 | rc = efx_siena_sriov_memcpy(efx, copy, 1); |
cd2d5b52 BH |
886 | if (rc) { |
887 | /* If we can't get the request, we can't reply to the caller */ | |
888 | if (net_ratelimit()) | |
889 | netif_err(efx, hw, efx->net_dev, | |
890 | "ERROR: Unable to fetch VFDI request from %s rc %d\n", | |
891 | vf->pci_name, -rc); | |
892 | vf->busy = false; | |
893 | return; | |
894 | } | |
895 | ||
896 | if (req->op < VFDI_OP_LIMIT && vfdi_ops[req->op] != NULL) { | |
897 | rc = vfdi_ops[req->op](vf); | |
898 | if (rc == 0) { | |
899 | netif_dbg(efx, hw, efx->net_dev, | |
900 | "vfdi request %d from %s ok\n", | |
901 | req->op, vf->pci_name); | |
902 | } | |
903 | } else { | |
904 | netif_dbg(efx, hw, efx->net_dev, | |
905 | "ERROR: Unrecognised request %d from VF %s addr " | |
906 | "%llx\n", req->op, vf->pci_name, | |
907 | (unsigned long long)vf->req_addr); | |
908 | rc = VFDI_RC_EOPNOTSUPP; | |
909 | } | |
910 | ||
911 | /* Allow subsequent VF requests */ | |
912 | vf->busy = false; | |
913 | smp_wmb(); | |
914 | ||
915 | /* Respond to the request */ | |
916 | req->rc = rc; | |
917 | req->op = VFDI_OP_RESPONSE; | |
918 | ||
919 | memset(copy, '\0', sizeof(copy)); | |
920 | copy[0].from_buf = &req->rc; | |
921 | copy[0].to_rid = vf->pci_rid; | |
922 | copy[0].to_addr = vf->req_addr + offsetof(struct vfdi_req, rc); | |
923 | copy[0].length = sizeof(req->rc); | |
924 | copy[1].from_buf = &req->op; | |
925 | copy[1].to_rid = vf->pci_rid; | |
926 | copy[1].to_addr = vf->req_addr + offsetof(struct vfdi_req, op); | |
927 | copy[1].length = sizeof(req->op); | |
928 | ||
327c685e | 929 | (void)efx_siena_sriov_memcpy(efx, copy, ARRAY_SIZE(copy)); |
cd2d5b52 BH |
930 | } |
931 | ||
932 | ||
933 | ||
934 | /* After a reset the event queues inside the guests no longer exist. Fill the | |
935 | * event ring in guest memory with VFDI reset events, then (re-initialise) the | |
936 | * event queue to raise an interrupt. The guest driver will then recover. | |
937 | */ | |
bf3d0156 DP |
938 | |
939 | static void efx_siena_sriov_reset_vf(struct siena_vf *vf, | |
327c685e | 940 | struct efx_buffer *buffer) |
cd2d5b52 BH |
941 | { |
942 | struct efx_nic *efx = vf->efx; | |
943 | struct efx_memcpy_req copy_req[4]; | |
944 | efx_qword_t event; | |
945 | unsigned int pos, count, k, buftbl, abs_evq; | |
946 | efx_oword_t reg; | |
947 | efx_dword_t ptr; | |
948 | int rc; | |
949 | ||
950 | BUG_ON(buffer->len != EFX_PAGE_SIZE); | |
951 | ||
952 | if (!vf->evq0_count) | |
953 | return; | |
954 | BUG_ON(vf->evq0_count & (vf->evq0_count - 1)); | |
955 | ||
956 | mutex_lock(&vf->status_lock); | |
957 | EFX_POPULATE_QWORD_3(event, | |
958 | FSF_AZ_EV_CODE, FSE_CZ_EV_CODE_USER_EV, | |
959 | VFDI_EV_SEQ, vf->msg_seqno, | |
960 | VFDI_EV_TYPE, VFDI_EV_TYPE_RESET); | |
961 | vf->msg_seqno++; | |
962 | for (pos = 0; pos < EFX_PAGE_SIZE; pos += sizeof(event)) | |
963 | memcpy(buffer->addr + pos, &event, sizeof(event)); | |
964 | ||
965 | for (pos = 0; pos < vf->evq0_count; pos += count) { | |
966 | count = min_t(unsigned, vf->evq0_count - pos, | |
967 | ARRAY_SIZE(copy_req)); | |
968 | for (k = 0; k < count; k++) { | |
969 | copy_req[k].from_buf = NULL; | |
970 | copy_req[k].from_rid = efx->pci_dev->devfn; | |
971 | copy_req[k].from_addr = buffer->dma_addr; | |
972 | copy_req[k].to_rid = vf->pci_rid; | |
973 | copy_req[k].to_addr = vf->evq0_addrs[pos + k]; | |
974 | copy_req[k].length = EFX_PAGE_SIZE; | |
975 | } | |
327c685e | 976 | rc = efx_siena_sriov_memcpy(efx, copy_req, count); |
cd2d5b52 BH |
977 | if (rc) { |
978 | if (net_ratelimit()) | |
979 | netif_err(efx, hw, efx->net_dev, | |
980 | "ERROR: Unable to notify %s of reset" | |
981 | ": %d\n", vf->pci_name, -rc); | |
982 | break; | |
983 | } | |
984 | } | |
985 | ||
986 | /* Reinitialise, arm and trigger evq0 */ | |
987 | abs_evq = abs_index(vf, 0); | |
988 | buftbl = EFX_BUFTBL_EVQ_BASE(vf, 0); | |
327c685e | 989 | efx_siena_sriov_bufs(efx, buftbl, vf->evq0_addrs, vf->evq0_count); |
cd2d5b52 BH |
990 | |
991 | EFX_POPULATE_OWORD_3(reg, | |
992 | FRF_CZ_TIMER_Q_EN, 1, | |
993 | FRF_CZ_HOST_NOTIFY_MODE, 0, | |
994 | FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS); | |
995 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, abs_evq); | |
996 | EFX_POPULATE_OWORD_3(reg, | |
997 | FRF_AZ_EVQ_EN, 1, | |
998 | FRF_AZ_EVQ_SIZE, __ffs(vf->evq0_count), | |
999 | FRF_AZ_EVQ_BUF_BASE_ID, buftbl); | |
1000 | efx_writeo_table(efx, ®, FR_BZ_EVQ_PTR_TBL, abs_evq); | |
1001 | EFX_POPULATE_DWORD_1(ptr, FRF_AZ_EVQ_RPTR, 0); | |
778cdaf6 | 1002 | efx_writed(efx, &ptr, FR_BZ_EVQ_RPTR + FR_BZ_EVQ_RPTR_STEP * abs_evq); |
cd2d5b52 BH |
1003 | |
1004 | mutex_unlock(&vf->status_lock); | |
1005 | } | |
1006 | ||
327c685e | 1007 | static void efx_siena_sriov_reset_vf_work(struct work_struct *work) |
cd2d5b52 | 1008 | { |
bf3d0156 | 1009 | struct siena_vf *vf = container_of(work, struct siena_vf, req); |
cd2d5b52 BH |
1010 | struct efx_nic *efx = vf->efx; |
1011 | struct efx_buffer buf; | |
1012 | ||
0d19a540 | 1013 | if (!efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE, GFP_NOIO)) { |
327c685e | 1014 | efx_siena_sriov_reset_vf(vf, &buf); |
cd2d5b52 BH |
1015 | efx_nic_free_buffer(efx, &buf); |
1016 | } | |
1017 | } | |
1018 | ||
327c685e | 1019 | static void efx_siena_sriov_handle_no_channel(struct efx_nic *efx) |
cd2d5b52 BH |
1020 | { |
1021 | netif_err(efx, drv, efx->net_dev, | |
1022 | "ERROR: IOV requires MSI-X and 1 additional interrupt" | |
1023 | "vector. IOV disabled\n"); | |
1024 | efx->vf_count = 0; | |
1025 | } | |
1026 | ||
327c685e | 1027 | static int efx_siena_sriov_probe_channel(struct efx_channel *channel) |
cd2d5b52 | 1028 | { |
2dc313ec SS |
1029 | struct siena_nic_data *nic_data = channel->efx->nic_data; |
1030 | nic_data->vfdi_channel = channel; | |
1031 | ||
cd2d5b52 BH |
1032 | return 0; |
1033 | } | |
1034 | ||
1035 | static void | |
327c685e SS |
1036 | efx_siena_sriov_get_channel_name(struct efx_channel *channel, |
1037 | char *buf, size_t len) | |
cd2d5b52 BH |
1038 | { |
1039 | snprintf(buf, len, "%s-iov", channel->efx->name); | |
1040 | } | |
1041 | ||
327c685e SS |
1042 | static const struct efx_channel_type efx_siena_sriov_channel_type = { |
1043 | .handle_no_channel = efx_siena_sriov_handle_no_channel, | |
1044 | .pre_probe = efx_siena_sriov_probe_channel, | |
726ba0e1 | 1045 | .post_remove = efx_channel_dummy_op_void, |
327c685e | 1046 | .get_name = efx_siena_sriov_get_channel_name, |
cd2d5b52 BH |
1047 | /* no copy operation; channel must not be reallocated */ |
1048 | .keep_eventq = true, | |
1049 | }; | |
1050 | ||
327c685e | 1051 | void efx_siena_sriov_probe(struct efx_nic *efx) |
cd2d5b52 BH |
1052 | { |
1053 | unsigned count; | |
1054 | ||
1055 | if (!max_vfs) | |
1056 | return; | |
1057 | ||
7e91a210 EC |
1058 | if (efx_siena_sriov_cmd(efx, false, &efx->vi_scale, &count)) { |
1059 | netif_info(efx, probe, efx->net_dev, "no SR-IOV VFs probed\n"); | |
cd2d5b52 | 1060 | return; |
7e91a210 | 1061 | } |
cd2d5b52 BH |
1062 | if (count > 0 && count > max_vfs) |
1063 | count = max_vfs; | |
1064 | ||
1065 | /* efx_nic_dimension_resources() will reduce vf_count as appopriate */ | |
1066 | efx->vf_count = count; | |
1067 | ||
327c685e | 1068 | efx->extra_channel_type[EFX_EXTRA_CHANNEL_IOV] = &efx_siena_sriov_channel_type; |
cd2d5b52 BH |
1069 | } |
1070 | ||
1071 | /* Copy the list of individual addresses into the vfdi_status.peers | |
dbedd44e | 1072 | * array and auxiliary pages, protected by %local_lock. Drop that lock |
cd2d5b52 BH |
1073 | * and then broadcast the address list to every VF. |
1074 | */ | |
327c685e | 1075 | static void efx_siena_sriov_peer_work(struct work_struct *data) |
cd2d5b52 | 1076 | { |
2dc313ec SS |
1077 | struct siena_nic_data *nic_data = container_of(data, |
1078 | struct siena_nic_data, | |
1079 | peer_work); | |
1080 | struct efx_nic *efx = nic_data->efx; | |
1081 | struct vfdi_status *vfdi_status = nic_data->vfdi_status.addr; | |
bf3d0156 | 1082 | struct siena_vf *vf; |
cd2d5b52 BH |
1083 | struct efx_local_addr *local_addr; |
1084 | struct vfdi_endpoint *peer; | |
1085 | struct efx_endpoint_page *epp; | |
1086 | struct list_head pages; | |
1087 | unsigned int peer_space; | |
1088 | unsigned int peer_count; | |
1089 | unsigned int pos; | |
1090 | ||
2dc313ec | 1091 | mutex_lock(&nic_data->local_lock); |
cd2d5b52 BH |
1092 | |
1093 | /* Move the existing peer pages off %local_page_list */ | |
1094 | INIT_LIST_HEAD(&pages); | |
2dc313ec | 1095 | list_splice_tail_init(&nic_data->local_page_list, &pages); |
cd2d5b52 BH |
1096 | |
1097 | /* Populate the VF addresses starting from entry 1 (entry 0 is | |
1098 | * the PF address) | |
1099 | */ | |
1100 | peer = vfdi_status->peers + 1; | |
1101 | peer_space = ARRAY_SIZE(vfdi_status->peers) - 1; | |
1102 | peer_count = 1; | |
1103 | for (pos = 0; pos < efx->vf_count; ++pos) { | |
bf3d0156 | 1104 | vf = nic_data->vf + pos; |
cd2d5b52 BH |
1105 | |
1106 | mutex_lock(&vf->status_lock); | |
1107 | if (vf->rx_filtering && !is_zero_ether_addr(vf->addr.mac_addr)) { | |
1108 | *peer++ = vf->addr; | |
1109 | ++peer_count; | |
1110 | --peer_space; | |
1111 | BUG_ON(peer_space == 0); | |
1112 | } | |
1113 | mutex_unlock(&vf->status_lock); | |
1114 | } | |
1115 | ||
1116 | /* Fill the remaining addresses */ | |
2dc313ec | 1117 | list_for_each_entry(local_addr, &nic_data->local_addr_list, link) { |
cd84ff4d | 1118 | ether_addr_copy(peer->mac_addr, local_addr->addr); |
cd2d5b52 BH |
1119 | peer->tci = 0; |
1120 | ++peer; | |
1121 | ++peer_count; | |
1122 | if (--peer_space == 0) { | |
1123 | if (list_empty(&pages)) { | |
1124 | epp = kmalloc(sizeof(*epp), GFP_KERNEL); | |
1125 | if (!epp) | |
1126 | break; | |
1127 | epp->ptr = dma_alloc_coherent( | |
1128 | &efx->pci_dev->dev, EFX_PAGE_SIZE, | |
1129 | &epp->addr, GFP_KERNEL); | |
1130 | if (!epp->ptr) { | |
1131 | kfree(epp); | |
1132 | break; | |
1133 | } | |
1134 | } else { | |
1135 | epp = list_first_entry( | |
1136 | &pages, struct efx_endpoint_page, link); | |
1137 | list_del(&epp->link); | |
1138 | } | |
1139 | ||
2dc313ec | 1140 | list_add_tail(&epp->link, &nic_data->local_page_list); |
cd2d5b52 BH |
1141 | peer = (struct vfdi_endpoint *)epp->ptr; |
1142 | peer_space = EFX_PAGE_SIZE / sizeof(struct vfdi_endpoint); | |
1143 | } | |
1144 | } | |
1145 | vfdi_status->peer_count = peer_count; | |
2dc313ec | 1146 | mutex_unlock(&nic_data->local_lock); |
cd2d5b52 BH |
1147 | |
1148 | /* Free any now unused endpoint pages */ | |
1149 | while (!list_empty(&pages)) { | |
1150 | epp = list_first_entry( | |
1151 | &pages, struct efx_endpoint_page, link); | |
1152 | list_del(&epp->link); | |
1153 | dma_free_coherent(&efx->pci_dev->dev, EFX_PAGE_SIZE, | |
1154 | epp->ptr, epp->addr); | |
1155 | kfree(epp); | |
1156 | } | |
1157 | ||
1158 | /* Finally, push the pages */ | |
1159 | for (pos = 0; pos < efx->vf_count; ++pos) { | |
bf3d0156 | 1160 | vf = nic_data->vf + pos; |
cd2d5b52 BH |
1161 | |
1162 | mutex_lock(&vf->status_lock); | |
1163 | if (vf->status_addr) | |
327c685e | 1164 | __efx_siena_sriov_push_vf_status(vf); |
cd2d5b52 BH |
1165 | mutex_unlock(&vf->status_lock); |
1166 | } | |
1167 | } | |
1168 | ||
327c685e | 1169 | static void efx_siena_sriov_free_local(struct efx_nic *efx) |
cd2d5b52 | 1170 | { |
2dc313ec | 1171 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
1172 | struct efx_local_addr *local_addr; |
1173 | struct efx_endpoint_page *epp; | |
1174 | ||
2dc313ec SS |
1175 | while (!list_empty(&nic_data->local_addr_list)) { |
1176 | local_addr = list_first_entry(&nic_data->local_addr_list, | |
cd2d5b52 BH |
1177 | struct efx_local_addr, link); |
1178 | list_del(&local_addr->link); | |
1179 | kfree(local_addr); | |
1180 | } | |
1181 | ||
2dc313ec SS |
1182 | while (!list_empty(&nic_data->local_page_list)) { |
1183 | epp = list_first_entry(&nic_data->local_page_list, | |
cd2d5b52 BH |
1184 | struct efx_endpoint_page, link); |
1185 | list_del(&epp->link); | |
1186 | dma_free_coherent(&efx->pci_dev->dev, EFX_PAGE_SIZE, | |
1187 | epp->ptr, epp->addr); | |
1188 | kfree(epp); | |
1189 | } | |
1190 | } | |
1191 | ||
327c685e | 1192 | static int efx_siena_sriov_vf_alloc(struct efx_nic *efx) |
cd2d5b52 BH |
1193 | { |
1194 | unsigned index; | |
bf3d0156 DP |
1195 | struct siena_vf *vf; |
1196 | struct siena_nic_data *nic_data = efx->nic_data; | |
cd2d5b52 | 1197 | |
bf3d0156 DP |
1198 | nic_data->vf = kcalloc(efx->vf_count, sizeof(*nic_data->vf), |
1199 | GFP_KERNEL); | |
1200 | if (!nic_data->vf) | |
cd2d5b52 BH |
1201 | return -ENOMEM; |
1202 | ||
1203 | for (index = 0; index < efx->vf_count; ++index) { | |
bf3d0156 | 1204 | vf = nic_data->vf + index; |
cd2d5b52 BH |
1205 | |
1206 | vf->efx = efx; | |
1207 | vf->index = index; | |
1208 | vf->rx_filter_id = -1; | |
1209 | vf->tx_filter_mode = VF_TX_FILTER_AUTO; | |
1210 | vf->tx_filter_id = -1; | |
327c685e SS |
1211 | INIT_WORK(&vf->req, efx_siena_sriov_vfdi); |
1212 | INIT_WORK(&vf->reset_work, efx_siena_sriov_reset_vf_work); | |
cd2d5b52 BH |
1213 | init_waitqueue_head(&vf->flush_waitq); |
1214 | mutex_init(&vf->status_lock); | |
1215 | mutex_init(&vf->txq_lock); | |
1216 | } | |
1217 | ||
1218 | return 0; | |
1219 | } | |
1220 | ||
327c685e | 1221 | static void efx_siena_sriov_vfs_fini(struct efx_nic *efx) |
cd2d5b52 | 1222 | { |
bf3d0156 DP |
1223 | struct siena_nic_data *nic_data = efx->nic_data; |
1224 | struct siena_vf *vf; | |
cd2d5b52 BH |
1225 | unsigned int pos; |
1226 | ||
1227 | for (pos = 0; pos < efx->vf_count; ++pos) { | |
bf3d0156 | 1228 | vf = nic_data->vf + pos; |
cd2d5b52 BH |
1229 | |
1230 | efx_nic_free_buffer(efx, &vf->buf); | |
1231 | kfree(vf->peer_page_addrs); | |
1232 | vf->peer_page_addrs = NULL; | |
1233 | vf->peer_page_count = 0; | |
1234 | ||
1235 | vf->evq0_count = 0; | |
1236 | } | |
1237 | } | |
1238 | ||
327c685e | 1239 | static int efx_siena_sriov_vfs_init(struct efx_nic *efx) |
cd2d5b52 BH |
1240 | { |
1241 | struct pci_dev *pci_dev = efx->pci_dev; | |
2dc313ec | 1242 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
1243 | unsigned index, devfn, sriov, buftbl_base; |
1244 | u16 offset, stride; | |
bf3d0156 | 1245 | struct siena_vf *vf; |
cd2d5b52 BH |
1246 | int rc; |
1247 | ||
1248 | sriov = pci_find_ext_capability(pci_dev, PCI_EXT_CAP_ID_SRIOV); | |
1249 | if (!sriov) | |
1250 | return -ENOENT; | |
1251 | ||
1252 | pci_read_config_word(pci_dev, sriov + PCI_SRIOV_VF_OFFSET, &offset); | |
1253 | pci_read_config_word(pci_dev, sriov + PCI_SRIOV_VF_STRIDE, &stride); | |
1254 | ||
2dc313ec | 1255 | buftbl_base = nic_data->vf_buftbl_base; |
cd2d5b52 BH |
1256 | devfn = pci_dev->devfn + offset; |
1257 | for (index = 0; index < efx->vf_count; ++index) { | |
bf3d0156 | 1258 | vf = nic_data->vf + index; |
cd2d5b52 BH |
1259 | |
1260 | /* Reserve buffer entries */ | |
1261 | vf->buftbl_base = buftbl_base; | |
1262 | buftbl_base += EFX_VF_BUFTBL_PER_VI * efx_vf_size(efx); | |
1263 | ||
1264 | vf->pci_rid = devfn; | |
1265 | snprintf(vf->pci_name, sizeof(vf->pci_name), | |
1266 | "%04x:%02x:%02x.%d", | |
1267 | pci_domain_nr(pci_dev->bus), pci_dev->bus->number, | |
1268 | PCI_SLOT(devfn), PCI_FUNC(devfn)); | |
1269 | ||
0d19a540 BH |
1270 | rc = efx_nic_alloc_buffer(efx, &vf->buf, EFX_PAGE_SIZE, |
1271 | GFP_KERNEL); | |
cd2d5b52 BH |
1272 | if (rc) |
1273 | goto fail; | |
1274 | ||
1275 | devfn += stride; | |
1276 | } | |
1277 | ||
1278 | return 0; | |
1279 | ||
1280 | fail: | |
327c685e | 1281 | efx_siena_sriov_vfs_fini(efx); |
cd2d5b52 BH |
1282 | return rc; |
1283 | } | |
1284 | ||
327c685e | 1285 | int efx_siena_sriov_init(struct efx_nic *efx) |
cd2d5b52 BH |
1286 | { |
1287 | struct net_device *net_dev = efx->net_dev; | |
2dc313ec | 1288 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
1289 | struct vfdi_status *vfdi_status; |
1290 | int rc; | |
1291 | ||
1292 | /* Ensure there's room for vf_channel */ | |
1293 | BUILD_BUG_ON(EFX_MAX_CHANNELS + 1 >= EFX_VI_BASE); | |
1294 | /* Ensure that VI_BASE is aligned on VI_SCALE */ | |
1295 | BUILD_BUG_ON(EFX_VI_BASE & ((1 << EFX_VI_SCALE_MAX) - 1)); | |
1296 | ||
1297 | if (efx->vf_count == 0) | |
1298 | return 0; | |
1299 | ||
327c685e | 1300 | rc = efx_siena_sriov_cmd(efx, true, NULL, NULL); |
cd2d5b52 BH |
1301 | if (rc) |
1302 | goto fail_cmd; | |
1303 | ||
2dc313ec SS |
1304 | rc = efx_nic_alloc_buffer(efx, &nic_data->vfdi_status, |
1305 | sizeof(*vfdi_status), GFP_KERNEL); | |
cd2d5b52 BH |
1306 | if (rc) |
1307 | goto fail_status; | |
2dc313ec | 1308 | vfdi_status = nic_data->vfdi_status.addr; |
cd2d5b52 BH |
1309 | memset(vfdi_status, 0, sizeof(*vfdi_status)); |
1310 | vfdi_status->version = 1; | |
1311 | vfdi_status->length = sizeof(*vfdi_status); | |
1312 | vfdi_status->max_tx_channels = vf_max_tx_channels; | |
1313 | vfdi_status->vi_scale = efx->vi_scale; | |
1314 | vfdi_status->rss_rxq_count = efx->rss_spread; | |
1315 | vfdi_status->peer_count = 1 + efx->vf_count; | |
1316 | vfdi_status->timer_quantum_ns = efx->timer_quantum_ns; | |
1317 | ||
327c685e | 1318 | rc = efx_siena_sriov_vf_alloc(efx); |
cd2d5b52 BH |
1319 | if (rc) |
1320 | goto fail_alloc; | |
1321 | ||
2dc313ec | 1322 | mutex_init(&nic_data->local_lock); |
327c685e | 1323 | INIT_WORK(&nic_data->peer_work, efx_siena_sriov_peer_work); |
2dc313ec SS |
1324 | INIT_LIST_HEAD(&nic_data->local_addr_list); |
1325 | INIT_LIST_HEAD(&nic_data->local_page_list); | |
cd2d5b52 | 1326 | |
327c685e | 1327 | rc = efx_siena_sriov_vfs_init(efx); |
cd2d5b52 BH |
1328 | if (rc) |
1329 | goto fail_vfs; | |
1330 | ||
1331 | rtnl_lock(); | |
cd84ff4d | 1332 | ether_addr_copy(vfdi_status->peers[0].mac_addr, net_dev->dev_addr); |
cd2d5b52 BH |
1333 | efx->vf_init_count = efx->vf_count; |
1334 | rtnl_unlock(); | |
1335 | ||
327c685e | 1336 | efx_siena_sriov_usrev(efx, true); |
cd2d5b52 BH |
1337 | |
1338 | /* At this point we must be ready to accept VFDI requests */ | |
1339 | ||
1340 | rc = pci_enable_sriov(efx->pci_dev, efx->vf_count); | |
1341 | if (rc) | |
1342 | goto fail_pci; | |
1343 | ||
1344 | netif_info(efx, probe, net_dev, | |
1345 | "enabled SR-IOV for %d VFs, %d VI per VF\n", | |
1346 | efx->vf_count, efx_vf_size(efx)); | |
1347 | return 0; | |
1348 | ||
1349 | fail_pci: | |
327c685e | 1350 | efx_siena_sriov_usrev(efx, false); |
cd2d5b52 BH |
1351 | rtnl_lock(); |
1352 | efx->vf_init_count = 0; | |
1353 | rtnl_unlock(); | |
327c685e | 1354 | efx_siena_sriov_vfs_fini(efx); |
cd2d5b52 | 1355 | fail_vfs: |
2dc313ec | 1356 | cancel_work_sync(&nic_data->peer_work); |
327c685e | 1357 | efx_siena_sriov_free_local(efx); |
bf3d0156 | 1358 | kfree(nic_data->vf); |
cd2d5b52 | 1359 | fail_alloc: |
2dc313ec | 1360 | efx_nic_free_buffer(efx, &nic_data->vfdi_status); |
cd2d5b52 | 1361 | fail_status: |
327c685e | 1362 | efx_siena_sriov_cmd(efx, false, NULL, NULL); |
cd2d5b52 BH |
1363 | fail_cmd: |
1364 | return rc; | |
1365 | } | |
1366 | ||
327c685e | 1367 | void efx_siena_sriov_fini(struct efx_nic *efx) |
cd2d5b52 | 1368 | { |
bf3d0156 | 1369 | struct siena_vf *vf; |
cd2d5b52 | 1370 | unsigned int pos; |
2dc313ec | 1371 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
1372 | |
1373 | if (efx->vf_init_count == 0) | |
1374 | return; | |
1375 | ||
1376 | /* Disable all interfaces to reconfiguration */ | |
2dc313ec | 1377 | BUG_ON(nic_data->vfdi_channel->enabled); |
327c685e | 1378 | efx_siena_sriov_usrev(efx, false); |
cd2d5b52 BH |
1379 | rtnl_lock(); |
1380 | efx->vf_init_count = 0; | |
1381 | rtnl_unlock(); | |
1382 | ||
1383 | /* Flush all reconfiguration work */ | |
1384 | for (pos = 0; pos < efx->vf_count; ++pos) { | |
bf3d0156 | 1385 | vf = nic_data->vf + pos; |
cd2d5b52 BH |
1386 | cancel_work_sync(&vf->req); |
1387 | cancel_work_sync(&vf->reset_work); | |
1388 | } | |
2dc313ec | 1389 | cancel_work_sync(&nic_data->peer_work); |
cd2d5b52 BH |
1390 | |
1391 | pci_disable_sriov(efx->pci_dev); | |
1392 | ||
1393 | /* Tear down back-end state */ | |
327c685e SS |
1394 | efx_siena_sriov_vfs_fini(efx); |
1395 | efx_siena_sriov_free_local(efx); | |
bf3d0156 | 1396 | kfree(nic_data->vf); |
2dc313ec | 1397 | efx_nic_free_buffer(efx, &nic_data->vfdi_status); |
327c685e | 1398 | efx_siena_sriov_cmd(efx, false, NULL, NULL); |
cd2d5b52 BH |
1399 | } |
1400 | ||
327c685e | 1401 | void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event) |
cd2d5b52 BH |
1402 | { |
1403 | struct efx_nic *efx = channel->efx; | |
bf3d0156 | 1404 | struct siena_vf *vf; |
cd2d5b52 BH |
1405 | unsigned qid, seq, type, data; |
1406 | ||
1407 | qid = EFX_QWORD_FIELD(*event, FSF_CZ_USER_QID); | |
1408 | ||
1409 | /* USR_EV_REG_VALUE is dword0, so access the VFDI_EV fields directly */ | |
1410 | BUILD_BUG_ON(FSF_CZ_USER_EV_REG_VALUE_LBN != 0); | |
1411 | seq = EFX_QWORD_FIELD(*event, VFDI_EV_SEQ); | |
1412 | type = EFX_QWORD_FIELD(*event, VFDI_EV_TYPE); | |
1413 | data = EFX_QWORD_FIELD(*event, VFDI_EV_DATA); | |
1414 | ||
1415 | netif_vdbg(efx, hw, efx->net_dev, | |
1416 | "USR_EV event from qid %d seq 0x%x type %d data 0x%x\n", | |
1417 | qid, seq, type, data); | |
1418 | ||
1419 | if (map_vi_index(efx, qid, &vf, NULL)) | |
1420 | return; | |
1421 | if (vf->busy) | |
1422 | goto error; | |
1423 | ||
1424 | if (type == VFDI_EV_TYPE_REQ_WORD0) { | |
1425 | /* Resynchronise */ | |
1426 | vf->req_type = VFDI_EV_TYPE_REQ_WORD0; | |
1427 | vf->req_seqno = seq + 1; | |
1428 | vf->req_addr = 0; | |
1429 | } else if (seq != (vf->req_seqno++ & 0xff) || type != vf->req_type) | |
1430 | goto error; | |
1431 | ||
1432 | switch (vf->req_type) { | |
1433 | case VFDI_EV_TYPE_REQ_WORD0: | |
1434 | case VFDI_EV_TYPE_REQ_WORD1: | |
1435 | case VFDI_EV_TYPE_REQ_WORD2: | |
1436 | vf->req_addr |= (u64)data << (vf->req_type << 4); | |
1437 | ++vf->req_type; | |
1438 | return; | |
1439 | ||
1440 | case VFDI_EV_TYPE_REQ_WORD3: | |
1441 | vf->req_addr |= (u64)data << 48; | |
1442 | vf->req_type = VFDI_EV_TYPE_REQ_WORD0; | |
1443 | vf->busy = true; | |
1444 | queue_work(vfdi_workqueue, &vf->req); | |
1445 | return; | |
1446 | } | |
1447 | ||
1448 | error: | |
1449 | if (net_ratelimit()) | |
1450 | netif_err(efx, hw, efx->net_dev, | |
1451 | "ERROR: Screaming VFDI request from %s\n", | |
1452 | vf->pci_name); | |
1453 | /* Reset the request and sequence number */ | |
1454 | vf->req_type = VFDI_EV_TYPE_REQ_WORD0; | |
1455 | vf->req_seqno = seq + 1; | |
1456 | } | |
1457 | ||
327c685e | 1458 | void efx_siena_sriov_flr(struct efx_nic *efx, unsigned vf_i) |
cd2d5b52 | 1459 | { |
bf3d0156 DP |
1460 | struct siena_nic_data *nic_data = efx->nic_data; |
1461 | struct siena_vf *vf; | |
cd2d5b52 BH |
1462 | |
1463 | if (vf_i > efx->vf_init_count) | |
1464 | return; | |
bf3d0156 | 1465 | vf = nic_data->vf + vf_i; |
cd2d5b52 BH |
1466 | netif_info(efx, hw, efx->net_dev, |
1467 | "FLR on VF %s\n", vf->pci_name); | |
1468 | ||
1469 | vf->status_addr = 0; | |
1470 | efx_vfdi_remove_all_filters(vf); | |
1471 | efx_vfdi_flush_clear(vf); | |
1472 | ||
1473 | vf->evq0_count = 0; | |
1474 | } | |
1475 | ||
cfc77c2f | 1476 | int efx_siena_sriov_mac_address_changed(struct efx_nic *efx) |
cd2d5b52 | 1477 | { |
2dc313ec SS |
1478 | struct siena_nic_data *nic_data = efx->nic_data; |
1479 | struct vfdi_status *vfdi_status = nic_data->vfdi_status.addr; | |
cd2d5b52 BH |
1480 | |
1481 | if (!efx->vf_init_count) | |
cfc77c2f | 1482 | return 0; |
cd84ff4d EC |
1483 | ether_addr_copy(vfdi_status->peers[0].mac_addr, |
1484 | efx->net_dev->dev_addr); | |
2dc313ec | 1485 | queue_work(vfdi_workqueue, &nic_data->peer_work); |
cfc77c2f SS |
1486 | |
1487 | return 0; | |
cd2d5b52 BH |
1488 | } |
1489 | ||
327c685e | 1490 | void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event) |
cd2d5b52 | 1491 | { |
bf3d0156 | 1492 | struct siena_vf *vf; |
cd2d5b52 BH |
1493 | unsigned queue, qid; |
1494 | ||
1495 | queue = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); | |
1496 | if (map_vi_index(efx, queue, &vf, &qid)) | |
1497 | return; | |
1498 | /* Ignore flush completions triggered by an FLR */ | |
1499 | if (!test_bit(qid, vf->txq_mask)) | |
1500 | return; | |
1501 | ||
1502 | __clear_bit(qid, vf->txq_mask); | |
1503 | --vf->txq_count; | |
1504 | ||
1505 | if (efx_vfdi_flush_wake(vf)) | |
1506 | wake_up(&vf->flush_waitq); | |
1507 | } | |
1508 | ||
327c685e | 1509 | void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event) |
cd2d5b52 | 1510 | { |
bf3d0156 | 1511 | struct siena_vf *vf; |
cd2d5b52 BH |
1512 | unsigned ev_failed, queue, qid; |
1513 | ||
1514 | queue = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_DESCQ_ID); | |
1515 | ev_failed = EFX_QWORD_FIELD(*event, | |
1516 | FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL); | |
1517 | if (map_vi_index(efx, queue, &vf, &qid)) | |
1518 | return; | |
1519 | if (!test_bit(qid, vf->rxq_mask)) | |
1520 | return; | |
1521 | ||
1522 | if (ev_failed) { | |
1523 | set_bit(qid, vf->rxq_retry_mask); | |
1524 | atomic_inc(&vf->rxq_retry_count); | |
1525 | } else { | |
1526 | __clear_bit(qid, vf->rxq_mask); | |
1527 | --vf->rxq_count; | |
1528 | } | |
1529 | if (efx_vfdi_flush_wake(vf)) | |
1530 | wake_up(&vf->flush_waitq); | |
1531 | } | |
1532 | ||
1533 | /* Called from napi. Schedule the reset work item */ | |
327c685e | 1534 | void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq) |
cd2d5b52 | 1535 | { |
bf3d0156 | 1536 | struct siena_vf *vf; |
cd2d5b52 BH |
1537 | unsigned int rel; |
1538 | ||
1539 | if (map_vi_index(efx, dmaq, &vf, &rel)) | |
1540 | return; | |
1541 | ||
1542 | if (net_ratelimit()) | |
1543 | netif_err(efx, hw, efx->net_dev, | |
1544 | "VF %d DMA Q %d reports descriptor fetch error.\n", | |
1545 | vf->index, rel); | |
1546 | queue_work(vfdi_workqueue, &vf->reset_work); | |
1547 | } | |
1548 | ||
1549 | /* Reset all VFs */ | |
327c685e | 1550 | void efx_siena_sriov_reset(struct efx_nic *efx) |
cd2d5b52 | 1551 | { |
bf3d0156 | 1552 | struct siena_nic_data *nic_data = efx->nic_data; |
cd2d5b52 BH |
1553 | unsigned int vf_i; |
1554 | struct efx_buffer buf; | |
bf3d0156 | 1555 | struct siena_vf *vf; |
cd2d5b52 BH |
1556 | |
1557 | ASSERT_RTNL(); | |
1558 | ||
1559 | if (efx->vf_init_count == 0) | |
1560 | return; | |
1561 | ||
327c685e SS |
1562 | efx_siena_sriov_usrev(efx, true); |
1563 | (void)efx_siena_sriov_cmd(efx, true, NULL, NULL); | |
cd2d5b52 | 1564 | |
0d19a540 | 1565 | if (efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE, GFP_NOIO)) |
cd2d5b52 BH |
1566 | return; |
1567 | ||
1568 | for (vf_i = 0; vf_i < efx->vf_init_count; ++vf_i) { | |
bf3d0156 | 1569 | vf = nic_data->vf + vf_i; |
327c685e | 1570 | efx_siena_sriov_reset_vf(vf, &buf); |
cd2d5b52 BH |
1571 | } |
1572 | ||
1573 | efx_nic_free_buffer(efx, &buf); | |
1574 | } | |
1575 | ||
1576 | int efx_init_sriov(void) | |
1577 | { | |
327c685e SS |
1578 | /* A single threaded workqueue is sufficient. efx_siena_sriov_vfdi() and |
1579 | * efx_siena_sriov_peer_work() spend almost all their time sleeping for | |
cd2d5b52 BH |
1580 | * MCDI to complete anyway |
1581 | */ | |
1582 | vfdi_workqueue = create_singlethread_workqueue("sfc_vfdi"); | |
1583 | if (!vfdi_workqueue) | |
1584 | return -ENOMEM; | |
cd2d5b52 BH |
1585 | return 0; |
1586 | } | |
1587 | ||
1588 | void efx_fini_sriov(void) | |
1589 | { | |
1590 | destroy_workqueue(vfdi_workqueue); | |
1591 | } | |
1592 | ||
7fa8d547 | 1593 | int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf_i, u8 *mac) |
cd2d5b52 | 1594 | { |
bf3d0156 DP |
1595 | struct siena_nic_data *nic_data = efx->nic_data; |
1596 | struct siena_vf *vf; | |
cd2d5b52 BH |
1597 | |
1598 | if (vf_i >= efx->vf_init_count) | |
1599 | return -EINVAL; | |
bf3d0156 | 1600 | vf = nic_data->vf + vf_i; |
cd2d5b52 BH |
1601 | |
1602 | mutex_lock(&vf->status_lock); | |
cd84ff4d | 1603 | ether_addr_copy(vf->addr.mac_addr, mac); |
327c685e | 1604 | __efx_siena_sriov_update_vf_addr(vf); |
cd2d5b52 BH |
1605 | mutex_unlock(&vf->status_lock); |
1606 | ||
1607 | return 0; | |
1608 | } | |
1609 | ||
7fa8d547 | 1610 | int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf_i, |
327c685e | 1611 | u16 vlan, u8 qos) |
cd2d5b52 | 1612 | { |
bf3d0156 DP |
1613 | struct siena_nic_data *nic_data = efx->nic_data; |
1614 | struct siena_vf *vf; | |
cd2d5b52 BH |
1615 | u16 tci; |
1616 | ||
1617 | if (vf_i >= efx->vf_init_count) | |
1618 | return -EINVAL; | |
bf3d0156 | 1619 | vf = nic_data->vf + vf_i; |
cd2d5b52 BH |
1620 | |
1621 | mutex_lock(&vf->status_lock); | |
1622 | tci = (vlan & VLAN_VID_MASK) | ((qos & 0x7) << VLAN_PRIO_SHIFT); | |
1623 | vf->addr.tci = htons(tci); | |
327c685e | 1624 | __efx_siena_sriov_update_vf_addr(vf); |
cd2d5b52 BH |
1625 | mutex_unlock(&vf->status_lock); |
1626 | ||
1627 | return 0; | |
1628 | } | |
1629 | ||
7fa8d547 | 1630 | int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf_i, |
327c685e | 1631 | bool spoofchk) |
cd2d5b52 | 1632 | { |
bf3d0156 DP |
1633 | struct siena_nic_data *nic_data = efx->nic_data; |
1634 | struct siena_vf *vf; | |
cd2d5b52 BH |
1635 | int rc; |
1636 | ||
1637 | if (vf_i >= efx->vf_init_count) | |
1638 | return -EINVAL; | |
bf3d0156 | 1639 | vf = nic_data->vf + vf_i; |
cd2d5b52 BH |
1640 | |
1641 | mutex_lock(&vf->txq_lock); | |
1642 | if (vf->txq_count == 0) { | |
1643 | vf->tx_filter_mode = | |
1644 | spoofchk ? VF_TX_FILTER_ON : VF_TX_FILTER_OFF; | |
1645 | rc = 0; | |
1646 | } else { | |
1647 | /* This cannot be changed while TX queues are running */ | |
1648 | rc = -EBUSY; | |
1649 | } | |
1650 | mutex_unlock(&vf->txq_lock); | |
1651 | return rc; | |
1652 | } | |
1653 | ||
7fa8d547 | 1654 | int efx_siena_sriov_get_vf_config(struct efx_nic *efx, int vf_i, |
327c685e | 1655 | struct ifla_vf_info *ivi) |
cd2d5b52 | 1656 | { |
bf3d0156 DP |
1657 | struct siena_nic_data *nic_data = efx->nic_data; |
1658 | struct siena_vf *vf; | |
cd2d5b52 BH |
1659 | u16 tci; |
1660 | ||
1661 | if (vf_i >= efx->vf_init_count) | |
1662 | return -EINVAL; | |
bf3d0156 | 1663 | vf = nic_data->vf + vf_i; |
cd2d5b52 BH |
1664 | |
1665 | ivi->vf = vf_i; | |
cd84ff4d | 1666 | ether_addr_copy(ivi->mac, vf->addr.mac_addr); |
ed616689 SC |
1667 | ivi->max_tx_rate = 0; |
1668 | ivi->min_tx_rate = 0; | |
cd2d5b52 BH |
1669 | tci = ntohs(vf->addr.tci); |
1670 | ivi->vlan = tci & VLAN_VID_MASK; | |
1671 | ivi->qos = (tci >> VLAN_PRIO_SHIFT) & 0x7; | |
1672 | ivi->spoofchk = vf->tx_filter_mode == VF_TX_FILTER_ON; | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
7fa8d547 SS |
1677 | bool efx_siena_sriov_wanted(struct efx_nic *efx) |
1678 | { | |
1679 | return efx->vf_count != 0; | |
1680 | } | |
834e23dd SS |
1681 | |
1682 | int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs) | |
1683 | { | |
1684 | return 0; | |
1685 | } |